Magnetic separator.



F. G. HEINEN.

MAGNETIC SEPARATOR.

APPLICATION FILED AUG.1o,19os. I

TS-SHEET 1.

Patentedy May 21,` 1912.

m E 1 i. I. A

F. C. HEINEN.

MAGNETIC SBPABATOR.

APPLICATION FILED AUG. 1o, 190e.

1,026,673. Patented May 21, 1912.

2 SHEETS-SHEET 2.

- l Ewen/@ rt'- Mfg. M XW @MA a6/ UNITED sTATEs PATENT OFFICE.

,FRANK C.HEINEN, OF CHICAGO, ILLINOIS.

MAGNETIC SEPARATOR.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, yFRANK C. HEINEN, a iesident of Chicago, in thecounty of Cook and State of Illinois, have invented certain new and useful Improvements in Magnetic Separatore, of which the following is a full, clear, and Vexact description.

The invention relates to magnetic separators, and more particularly to that type in which a cylinder or` drum is employed `for displacing the magnetic, from the non-magnetic, particles.`

In magnetic separators in which a cylinder or drum serves as the carrier for the magnetic particles, t-he capacity eiliciencyof the separator are limited by the number of electro-magnets wli'ichinay be disposed in the carrying-arc or range of action. The capacity and efficiency of cylin` dric separatoi'sare further limited by reasony of the fact that the axes or lines' of magneticforce are across or between the edgeportions of the-polepieces leaving the central portion of the face of the'pole-piece ineffective to attract and hold small'magnetic particles or substances particularly those of low magnetic susceptibility.v In magnetic separators in which the material is carried over a stationary or fiat pole-piece it has been proposed to increase the efficiency and capacity of the machine by dividing the pole into a series of magnetically separated faceportions, so that magnetic lines of force emanate from the edges ofthe magnetic face portions to render a greater portion of the `face efficient and active in attracting niag.

netic particles.Y However, in said-.machines in which stationary pole-pieces are femployed, a belt or carrier is necessary to convey4 the material into and out of the field of the magnet, and resultantly lthe efficiency of the separator particularly with respect to particles of low magnetic susceptibility, was

decreased by the interposedtcarrying-belt or body.

magnetic lines of force emanate', to render a. greater 'portion of each-polar face active One of the im ort'ant objects of the inven-4 aiid efficient in, attracting magnetic particles; resultantly. the material may be broughtl directly into contact .with the magnetized face-portions,- of the. pole-pieces `without the interposition of a carrier, and

Patented May 21,1912. Application filed August 10, 1908. Serial No. 447,675.

are efficient in attracting yand separating particles fromthe lore or gangue. Thus,

.both t-he efficiency and separating capacity l of the. machine are increased by providing pole-pieceshaving their operative or magnetic faces formed to constitute a peripheral section of the cylinder or drum and dividing eaclixface into a large number of cylindrical polar face-portions.

The invention further designato provide a structure in which the interior periphery or bore of the rotatable cylinder is constitutedvof pole-pieces, having their faces divided into `separate face-portions to adapt the separator forthe separation of magnetic particles from wet material or that in which the solids are carried in suspension in vwater and'is caused to travel longitudinally through the cylinder rather than around the cylinder. l

The invention further designs to provide a magnetic separator of improvel construc- -tion in which the vinterior periphery of the cylinder orV drum is constructed so that it is Water-tight and adapted for use in separating magneticparticles Yfrom wet deposits.

The 'invention consists in the several novel featuresl hereinafter set forth*` and more particularly defined by claim at the conclusion hereof, i

In the' drawings: Figure l isa longitudinal section of a separator embodying the invention. -Fig 2, is a front end elevation.

Fig. 3 is a section on line 3 3 of Fig. 1.

In the referred `:form of the, invention exemplified in the drawings, the separator comprises a rotatable cylinder, usually mounted at `an inclined angle to cause the material to fiowftherethrough by lgravitation, and havin an interior periphery or bore through which the lmaterial to be sepa- '.rated passes, and into which it isefed at one' end. The cylinder is revolubly mounted on a suitable frame 12. Rollers `16, mounted on shafts 15 .serve to revolubly sustain the ioo Y y drinnl or cylinder. said shafts being mounted in suitahle brackets oighearings l-l on the iframe l2. The drinn or cylinder vis provided with bands l1A which travel oo said rollers f1.6)I ',lh'e drum ,is 4secured lagainst longitudinal movement byal 4bracket. 23 in which are journaled suitable tlirust-rollers Q4.I vAny suitable mechanism may befprof vided for rotatingxthe drum; that illustrated comprising a sprocket-wheel 18. on each of the vroller-shafts 15. a eliainl, and a 4spiocloet.-wheel 1,9 mounted lon a driveshaftQO. c i .f The rotatable c ilinder comprises an exA lernal para-magnetic shell 27 `and an vin*- te-rnal. lxeripliei-y. -over and thronghpvhich the 4material to dbe separated. is adapted-Kto pass. vThis internal periphery is formed by a vseries of `arcuate heads 30l which are integrally forniedwith niagnetcores 29 extending betweenthe heads `and the exterior shell and' securedto the 'latter by screws or bolts 29. The innerlpolar face of each arcuate head forms a `curved section of the internal operative peripher ofY the cylinder so that all of the faces of the polefpieces willv be concentric whena'ssembledfand in operative relation.l The sides 33.01 the' poleheads are outwardly ttapering to provide a correspondingly tapered space for a nonmagnetic wedge strip C31. the inner face-ot for separating wetv deposits, it is necessary to make theint'ernal periphery watertight to preventleakage into and around the coils.

For this pifirpose, packing-strips 3l arc interposed between the 'wedge-strips v8l and the Sides of the ypole-heads. so that as bolts 32 .are tightened. strips 3l will be wedged tightly between the adjacent poledieads and an effective water-tight connection between the parts is cttected. so that the interior periphery ofjthe cylinder will he unter-tight throughout.' The pole-pieces thus constitute sectionsot the internal peripheevand the adjacent coils arev suitably wound to induce ajmag'netic How, -as indicated hy arrows in Fig. 3, so that the polar faces ot each section or head will be ot' the opposite sign or polarity, thus producing a magnetic iicld be.- tween the polar faces ol the adjacent sections. Each inner face of the pole-piece. is constituted of a plurality. of narrow longitudinally extending tace-portionsl which .are separated trom. one another andthe `the separated face-portions of each `polar 73 face. y v. l, l

In practice ithas beenhfound thatv when the polar Itace is-not .divided the edges of the polar faces have/greatergattractivepowv ers than.the;,centralxfportions thereof and '75 by dividing the operative face of leach,l polepiece-'into a` plurality offsmall or narrow separated face-.portions and dividing `them -by non-magnetic `I'illiiigs, the ientire faceof the pole-piece is renderedfetfective:sorthat 80 the `'capacity:and eflicieney of eachpole-,piece will be increased.` ,A pole-piece embody'iiig these characteristics isgfornied-.by providing the head 'Withga number of vlon-.cogitudinally extendinglaterally narrow para-.magnetic strips lfwliichare secured in grooves in the head and filling .the spacesbetweenthe strips With-Babbitt metal or brass, lpreferably theforiner.

l In 'constructin or polefpiecesyare lsecured to the outer :shell `and the division-,strips are secured in place and thennby looringtlre` internal periphery allv portions` thereof torinedby =the lpolar facefportio'ns, theyfillings and the divisionf 95 strips will be rendered concentricl .toform a smooth4 and. water-tight surface over which wet material will readily flow.k `Furtherinorefby extending the ole-pieces longitudinally throughoutthe ength of the in- 160 ternal periphery of the `cylinder andprovidingt-he pole-pieces` with a series lof magneticallyaseparated tace-portions, wety niaterial assit passes through the cylinder is ysubjected to the magnetic forceswduring a long 105 period, resultingin the separation of particles of low magnetic susceptibility.

.\tthe upper end of the cylinder, a plate 40, of .insulating material is secured and a contaet-ring `al to which. one end yof the 110 windings for eachjpole-piece is connected, is secured on said plate. The opposite end of each winding is connected to, a contactarni 4Q, a series ofsuch being mounted upon the plate 40, and each arm carries' arbrusli 115 Upon theffrai'nell is mounted la pair of standards '44 carrying aninsulating `ring l5 having thereon a .stationary segmental contact 45 which is arranged to Vcontact with such brushes 43 as may be passing in 120 the corresponding arc of their rotation. A hrush 46 has a constant bearing ,uponkcoir tact-ringer The segment `45 is usually semi-circular or approximately so, and ex- ,i tends from a pointonone side of a vertical 1.25

the arrow (Fig. Q) jeach winding will be 13o energized during the time that` it is passing through the bottom' of its cyclevof rotation until it reaches a point nea-r the top of the machine when brushv 43 passes out ofcoutact with contact 46 and the coil becomes successively denergized. To minimize the arcing on the separation ot' the brushes,l I arrange a magnet blow-out- 4T at 'the end of arcuate contact 45 as shown in Fig. 2.

To each end of the cylinder'is'secured a cylindrical extension indicated respectively at -lS and 4t). each ati'ording an extension of the interior periphery of the cylinder. Extension 4 8 is arranged tov receive the gangue from a .feed-spout l() which receives it from any suitable source of supply and the 'extension el!) forms a discharge or eduction spout foludclivering the residual material from which the magnetic material has been separated by the machine.

lVithin the cylinder and its extensiem.V a tray or pan-51 extends in parallelism and is in proximity tothe upper portion ot' inner periphery ot' the cylinder, such tray `being 'mounted upon suit-able supports 52;` 53.and open at its tail end to deliver th'e separated material where desired. A spray-pipe extends longitudinallyof the cylinder and is arranged to wash tthe internal peripheryv thereof down vardly-against the direction of rotation of the cylinder and similar spraypipe 56 is arranged between the pan 51 and the top of the cylinder to wash the surface of the cylinder abovethe pan and said spray-pipe also directs. tle spray in direction opposite to the rotation/motion ofthe cylinder. A scraper 60 is also secured to the spray-pipe 56.-

In operation. current being supplied, the pole-pieces will be successively energized througha portion ofeach revolution from the time they reach .the bottom until the inner pole-faces reach the upper portion of their path. Resultantlv the strongly magnetized face-.portions of each pole-piece will Contact with the magnetic particles in the mass of lnaterial fed into the head-end of the machine and traversing the cylinder longitudinally during its rotation. In passing through the cylinder, the material will be agitated s0 that all particles thereof will. at some time, be brought within the magnetic field. The para-magnetic particles at` tracted by the para-magnetic face-portions of each pole-piece will be lifted thereby un` til they are discharged into the pan 5].

Spray-pipe 55 will .wash back the diamagnetic particles so that they will not be carried upwardly-into the pan 51. Successive d'energization of the polar faces occurs as they Passover the pan or tray 51 and in event there is residual magnetism in the pole-faces', spray-pipe 56 and scraper (S0 will causeV the particles to be delivered into the tray.

4'whether of high or low magnetic susceptibility into the magnetic tield.

The longitudimllly extending narrow and magnetically separated fate-portions ot' cach pole-piece, increase the capacity and etliciency of the structure. Thestruclurc pro- .vides one vin which the polar faces are constituted of a plurality of magnetically separated face-portions embodied in the internal operative periphery ofthe'cylinder aml adapted for the separation of magnetic Aparticles from wet gangue or material. The internal periphery. being formed ot' sections` and water-tight connections therebetween. adapts the structure for the treatnnfnt of wet material an'd avoids all dangerot thc passage of water to the coils. v

The invention is not to bc understood as restricted lo` the details setit'orth since these may be modified within the scope of thc appended claims without departing from the spirit and scope of the invention.

Having thus described tl\.e invention. what I claim as new and desire to secure by Letters Patent, is:

1. In a magnetic separator. a rotatable cylinder comprisinga 4plurality of sectionsl cach having an arcuate polar Jface forming a section "of the operative interior periphery of the cylinder, means for magnetizing said vsectionsfmeans for feeding the material. to

be separated to said cylinder` and removable non-magnetic division strips between and locking said sections against inward radial movement and having faces concentric with said polar face-portions.

2. In a magnetic separator. a rotatable cylinder comprising a plurality ot' separate] y removable sections each having an a rcuatc polar face forming a section of the operative interior periphery of the cylinder and tapered on .its sides to enlarge outwardly` removable non-magnetic filling strips having similarly tapered sides interposed between the tapered sides of said face-portions to lock the same against inward radial movement. and having their faces substantially Vconcentric with said arcuate polar face-portions. means for magnetizing said sections. and means for feeding the material to be separated into thecylinder.

In a magnetic separator. a rotatable cylinder comprising an exterior paraanagnetic shell. pole-'pieces having radially extending'cores and arcuate heads having inner polar fzlcesfoiiliiiig a section of the internal periphery Jof the cylinder and formed to. leave tapered spaces between thecontiguous'v edges-,of the adjacent heads, non-magnetic cylinder comprising an exterior shell, a plufilling vstrips wedged in said spaces, boltsl 'onnecting said lling-strips with the ext rior shell, and means for feeding' the niaf4'. In a magnetic separator, a rotatable raility 'of pole-pieces secured to said shell g each comprising a core projecting radiall \v inwardly from the shell and an arcuate. head forming part of an interior shell and 'lorn'iinga portion of the internal periphery ot' jtlie Cylinder and inwardly beveled at itsl longrtudinal edges to provide between adnurent A tween said strips a nd the contiguous sarlat-es heads outward tapering spaces.v wedge shaped filling strips in said spaces and teni sion means connecting said illingfstripsI with p theexterior shell.

5. InV a magnetic separator, a rotatable cylinder comprising pole-pieces having their inner faces forming a section of the internal l l l periphery of the cylinder; non-magnetici strips between the pole-pieces, packing` interposed between tlie contiguous surfaeesof the strips and the pole-pieces to render the g;

cylinder comprising anA exterior para-mag;

netie shell, pole-pieces secured to said shell veach having ageore;extending radially inward from the shell fand au arcuate head 4 shaped to providetapering surfaces between the adjacent heads.' wedge-shaped `fillingstrips in said spaces, packingr interposed beo'f the heads, and means for securing said strips in said spaces;

FRANK lllllNlG.

VitneSSeS:

FRED GisuLAoi-i, Lisoxi: R essi-:Ln 

